H.G. ยท Hg. von George C. Avery
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 101 Substitution Tables for Students of English | 978-0-521-05067-8 (0-521-05067-7) | 1967 |
| 101 Substitution Tables for Students of English Teacher's guide: Tchrs'.& Adv.Students Gde | 978-0-521-05068-5 (0-521-05068-5) | 1967 |